Chromatic Harmonica Solo Tuning Layouts

Some 12 hole harmonica brands are available in a range of keys:

LowestTenor C, D, Eb, E, F, G, A, Bb, B, middle CHighest

The highest tuned stock chromatic harmonica is the regular C starting on middle C (similar range to a concerto flute), and the lowest stock chromatic harmonica is the Tenor C (a semitone lower in range than an Alto Eb Saxophone).
Stock 16 hole Chromatic Harmonicas are only available in key of C starting on C below middle C, the same starting note as a Tenor C 12 hole chrom.
Stock 14 hole Chromatic Harmonicas are only available in key of C starting on G below middle C, the same starting note as a key of G 12 hole chrom, but with the
same layout as a C chromatic harmonica.

In Western music theory there are only 12 chromatic notes in an octave,
so there are four enharmonics which are not shown in these tables:

Hole one blow is C below middle C, so the next set of C's are middle C.
On some 16 hole harps the first octave holes are numbered 1 to 4 with dots above them, then the remaining holes are numbered 1 to 12. Other 16 hole chroms are numbered from 1 to 16.
It depends on the make, model and production date.

Hole one blow is G below middle C, so the first set of C's are middle C.
On some 14 hole harps the first two holes are not numbered at all, then the remaining holes are numbered 1 to 12. Other 14 hole chroms are numbered from 1 to 14. It depends on the make & model.